<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>123</title>
        <style>
            div{width:200px;
                  height:200px;
                  border:50px solid yellow;
                  padding:40px;
                  margin:50px;}
        
        </style>

	</head>
	<body>
    <h1>黄志涛的第一个网页</h1>
    <div>黄色盒子</div>
	</body>
</html>

